Code M01-1255: Multiple secondary ax selected
Issue Description & Safety Warning
The Mitsubishi M800/M80 CNC has triggered a critical Multiple secondary ax selected alarm. Immediate attention from a qualified operator or maintenance technician is required to prevent secondary damage to the equipment or spoiled parts during the manufacturing cycle. Always ensure standard safety and LOTO procedures are followed before accessing electrical cabinets.
Official Troubleshooting Steps
Details For the multiple axis synchronization control, you selected two or more slave axes without selecting any master axis. Remedy Correct the setting of R2589 (Synchronous control operation method selection). Cmnd invalid during VCC mode 1300 Details The issued command is disabled during the vibration cutting mode. Remedy Correct the program. VCC mode command invalid 1301 Details Vibration cutting mode start command has been issued although the command is disabled during the currently active mode. Remedy Correct the program. VCC invalid 1302 Error cause number Details [When error cause No. is 0001] Cutting is being performed without vibration cutting control. [When error cause No. is 0002] Vibration cutting is being performed with OMR-FF being disabled. Remedy [When error cause No. is 0001] Make sure that the "VCC: Temporary cancelof axis vibration" signal (R22532) is OFF. Make sure that the spindle speed command isnot "0" when the cutting command is issued. Make sure that neither synchronized axis nor superimposed axisis included in the part system. [When error cause No. is 0002] Make sure that the servo parameter "#2313 SV113" bit0is "1" and bit1 is "0" for the VCC objective axes. Feedrate limited during VCC 1303 Details The feedrate command issued during the vibration cutting mode is exceeding "#12571 VibClamp_VCC". Remedy Correct the program. VCC condition not found 1304 Details No applicable condition is found during theselection of the vibration cutting condition. Remedy Correct the program. Check the setting of the frequency upper limit "#12131 FrqClmpSys_VCC". Check the settings of the maximum spindle rotationspeed "#3005 smax1" to "#3008 smax4" and the min- imum rotation speed "#3023 smini". Cannot change SP speed in VCC 1307 Details You changed the spindle rotation speed during vibration cutting control. Remedy Wait for completion of vibration cutting control, or input Reset to cancel the VCC mode. Cannot re-runSP during VCC 1308 Details You stopped the spindle during vibration cutting control, and then attempted to re-run it. Remedy If you have stopped the spindle during vibration cuttingcontrol, input Reset to cancel the VCC mode before re-running the spindle.
Source: Mitsubishi M800/M80/E80 Series Alarm/Parameter Manual (IB-1501279)
Last reviewed: 2026-07-01 · Verified against the manufacturer’s official documentation.
About Mitsubishi M800/M80 CNC Alarms
Mitsubishi controllers include extensive self-diagnostics that flag or halt the machine when a fault is detected. Error code M01-1255 on the M800/M80 CNC identifies one specific fault condition — its documented cause and the official corrective steps are listed above, sourced from Mitsubishi's service documentation. Always confirm against the manual for your exact machine configuration and follow LOTO procedures before servicing.
Complete Alarm List: 722 Mitsubishi M800/M80 CNC codes.
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